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Cornerstone · Grades 3–5 Keystones #1 20 November 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 58

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 2:3:4

    Answer: 24, 36 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 31, 23, 12, 34, 44, 29, 24, 49

    Answer: 30.75

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